Magnetic States and Magnetization Process in Ni–Fe Sub-micron Cup-Shaped Dots
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概要
- 論文の詳細を見る
We have investigated the magnetic states and magnetization process in sub-micron cup-shaped magnetic dots that consist of magnetic circular layers and magnetic ring layers. Ni-20 at% Fe cup-shaped dots with an outer diameter of 500 nm have vortical magnetic configurations at zero magnetic fields to reduce magnetostatic energy, while Co-17 at% Pt cup-shaped dots show the unidirectional magnetic configurations. Results of micromagnetics simulation show that the vortex-nucleation field of the Ni-20 at% Fe cup-shaped dots is positive, however, it is lower than that of the ordinary ring dots because the magnetic circular layers of the cup-shaped dots introduce vortex cores into themselves.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2003-08-15
著者
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TAKAHASHI Noritsugu
Department of Materials Science and Engineering & Frontier Research Center, Graduate School of Engin
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ASOH Hana
Department of Materials Science and Engineering & Frontier Research Center, Graduate School of Engin
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Kawamura Yoshio
Department Of Material Science And Engineering Osaka University
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Nakatani Ryoichi
Department Of Materials Science And Engineering & Frontier Research Center Graduate School Of En
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Yamamoto Masahiko
Department Of Biofunctional Chemistry Graduate School Of Natural Science And Technology Okayama Univ
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Kawamura Yoshio
Department of Materials Science and Engineering & Frontier Research Center, Graduate School of Engineering, Osaka University, Yamadaoka, Suita, Osaka 565-0871, Japan
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Asoh Hana
Department of Materials Science and Engineering & Frontier Research Center, Graduate School of Engineering, Osaka University, Yamadaoka, Suita, Osaka 565-0871, Japan
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